/Engine/Source/Runtime/Core/Public/Serialization/BitReader.h
This appends data from another BitReader. It checks that this bit reader is byte-aligned so it can just do aTArray::Appendinstead of a bitcopy. It is intended to be used by performance minded code that wants to ensure an appBitCpy is avoided.
void AppendDataFromChecked ( uint8 * Src, uint32 NumBits )